/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraEditorSettings.h
Sets a delegate that allows external code to restrict which features can be used within the niagara editor by filtering which assets are allowed.
void SetOnShouldFilterAssetByClassUsage ( const [FOnShouldFilterAssetByClassUsage](API\Plugins\NiagaraEditor\UNiagaraEditorSettings\FOnShouldFilterAssetByClassUsage) & InOnShouldFilterAssetByClassUsage )